An author’s style is the particular way in which the author writes.
Each author uses literaty devices in such a way that it makes his or her writting recognizable. The author's style will depend on their choice of words, mood created and usage of dialogues, tone and sensory language.
There are many different styles that can be used for writting. Some authors are more descriptive while other mainly focus on narrative. Some texts seek to persuade the reader and others are merely explicative.